Sen. Jeff Sessions, the top Republican on the Senate Judiciary Committee, says he will vote against Judge Sonia Sotomayor’s confirmation to the Supreme Court in the committee vote scheduled for Tuesday.

In a column published in today’s USA TODAY, the Alabama senator questioned whether Sotomayor would follow through as a justice on her pledge in confirmation hearings to show “fidelity to the law.”

“I don’t believe that Judge Sotomayor has the deep-rooted convictions necessary to resist the siren call of judicial activism,” Sessions wrote. “She has evoked its mantra too often.” Saying her testimony and record were at odds, he asked: “Which Sotomayor will we get?”